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Exactly! In https://matrix.dev/blog-2026-04-04-2.html#questions-this-rai... , we raised exactly the same concerns. In particular, we actually saw that a hot swap caused a 100% cach…

We noticed this two weeks ago where we found some of our requests are unexpected took more tokens than measured by count_tokens call. At the end they were Anthropic's A/B testing r…

Apparently they were A/B testing Opus 4.7 two weeks before officially released. Some requests were route to 4.7 occasionally when specifying Opus 4.6 for some accounts. https://mat…